MAHLE OC 236 vs WIX 51521: Oil Filter Compatibility
Compare MAHLE OC 236 and WIX 51521 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 3/4-16 thread.
Quick verdict
Both use a 3/4-16 thread.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
MAHLE OC 236 and WIX 51521 specifications
How matching is scored| Specification | MAHLE OC 236 | WIX 51521 |
|---|---|---|
| Thread size | 3/4-16 | 3/4-16 |
| Gasket OD | 72 mm | 71.98 mm |
| Gasket ID | 62 mm | 62.53 mm |
| Can OD | 92.96 mm | 92.99 mm |
| Height | 93.98 mm | 96.01 mm |
| Internal bypass valve | Yes | Yes |
| Bypass PSID | 12 - 15 | 8 - 11 |
| Anti-drainback valve | Yes | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD is identical at 72 mm.
Gasket ID differs by 0.5 mm (MAHLE OC 236: 62 mm, WIX 51521: 62.53 mm).
WIX 51521 is 2 mm taller (MAHLE OC 236: 93.98 mm, WIX 51521: 96.01 mm) -- check clearance before substituting.
Can OD is identical at 92.96 mm.
Both open their bypass valve in a comparable range: MAHLE OC 236 at 12-15 psi, WIX 51521 at 8-11 psi -- these ranges do not overlap.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.